• (n.) Any species of small marine fishes of the genera Onos and Rhinonemus (formerly Motella), allied to the cod. They have three or four barbels. Found on http://thinkexist.com/dictionary/meaning/rockling/
Rock'ling noun (Zoology) Any species of small marine fishes of the genera Onos and Rhinonemus (formerly Motella ), allied to the cod. They have three or four barbels. Found on http://www.encyclo.co.uk/webster/R/88